项目中对模板和js，css文件进行压缩的处理类

<?php

/**
* 代码压缩处理
*
* 1.压缩模板文件，去掉所有换行和头尾空格
* 2.压缩js和css文件，生成同名.min.js或.min.css文件
*
* @author 废墟 <r.anerg#gmail.com>
* @version 1.1
* @link http://anerg.com
*
*/
ini_set("memory_limit", -1);
ini_set("display_error", 1);
error_reporting(E_ALL);
date_default_timezone_set('Asia/Shanghai');

define('BASEPATH', dirname(__FILE__));

class Compress_Template {

 private $input_dir; //模板源目录
 private $output_dir; //压缩后的模板目录

 public function __construct($type) {
   $this->input_dir = dirname(BASEPATH) . '/application/views_src/';
   $this->output_dir = dirname(BASEPATH) . '/application/views/';
   $this->js_dir = dirname(BASEPATH) . '/wwwroot/static/js/';
   $this->css_dir = dirname(BASEPATH) . '/wwwroot/static/css/';
 }

 public function run() {
   exec('rm ' . $this->output_dir . ' -rf');
   $this->compress_file($this->input_dir, $this->output_dir);
   $this->compress_js_css();
 }

 private function compress_js_css() {
   exec('for JS in $(find ' . $this->js_dir . ' -type f -name "*.js"|grep -v "min.js"); do java -jar compiler.jar --charset=UTF-8 --compilation_level=SIMPLE_OPTIMIZATIONS --js=$JS --js_output_file=${JS%%.js}.min.js; done');
   exec('for CSS in $(find ' . $this->css_dir . ' -type f -name "*.css"|grep -v "min.css"); do java -jar yuicompressor-2.4.7.jar --type css --charset utf-8 -o ${CSS%%.css}.min.css $CSS; done');
 }

 private function compress_file($input, $output) {
   $input = rtrim($input, DIRECTORY_SEPARATOR);
   $output = rtrim($output, DIRECTORY_SEPARATOR);
   if (is_dir($input)) {
     $input .= DIRECTORY_SEPARATOR;
     $output .= DIRECTORY_SEPARATOR;
     foreach (glob($input . "*") as $path) {
       $compress_path = str_replace($input, $output, $path);
       if (is_dir($path)) {
         if (!is_dir($compress_path)) {
           $this->mkpath($compress_path);
         }
         $this->compress_file($path, $compress_path);
       }
       if (is_file($path)) {
         $data = array_map("trim", file($path));
         file_put_contents($compress_path, join('', $data));
       }
     }
   }
 }

 private function mkpath($path) {
   return is_dir($path) or ($this->mkpath(dirname($path)) and (mkdir($path, 0777) and chmod($path, 0777)));
 }

}

$app = new Compress_Template();
$app->run();
echo "OK!\n";